This research report examines the association between problem gambling and the social determinants of health in the UK. Social determinants of health include social class, education, ethnic group, age, and sex. The project consisted of a secondary analysis of the Gambling in England and Scotland, 2016: Combined Data from the Health Survey for England and the Scottish Health Survey (the researchers concatenated the data from 2012, 2014, and 2016). About 0.5% of the adults in England and Scotland met the threshold for severe problem gambling. The most common types of gambling were National Lottery tickets, scratch cards, and other lotteries. Significant social and demographic risk factors for problem gambling included being male, being younger (25 to 34), being single or never married, employed in manual and routine labour, identifying as Black or other, and having lower levels of education. Most stakeholders interviewed for the project felt that the reported frequencies of problem gambling were lower than they expected and they questioned the accuracy of the estimates.